# @Version : 1.0
# @Author  : 刘宇
# @File    : 06_if_exercise03.py
# @Time    : 2025/10/7 15:59

a = float(input("请输入a："))
b = float(input("请输入b："))

c = a + b
if a >= 10.0 and b <= 20.0:
    print("c= ", c)
